Meet the bKey: an elegant, compact battery solution for iPhone and Android devices. This is a cable-free battery with a built-in USB tip to charge it and a micro-USB or Lightning tip to recharge your smartphone. You can easily carry it on your keychain. The bKey is small enough to fit in your pocket easily. The bKey has a charge indicator light. Just connect the device to a USB port, and you are ready to recharge it.
The bKey has a 230 mAh battery inside that holds its charge over 30 days (500+ battery cycles). It measures 75 mm in length and 15 mm in width. It is only 6.5 mm thick. Like what you see? You can get yours on Kickstarter. Just make sure you pick the right version for your phone.